JasperReports Library, the world's most popular open source business intelligence and reporting engine and JasperReports Server, the most popular open source interactive report server built-on JasperReports Library

Zekr is an open source Quran study software for Windows, Linux and Mac. It's designed to ease access to the most authentic and valuable text of Muslims. Zekr provides Quran translations, recitation, search and other features to study Holy Quran.

Barcode4J is a flexible generator for barcodes written in Java and available under the Apache License v2.0. Features: Extensions for Apache FOP, Xalan-J and SAXON, Servlet, command-line interface, output to SVG, EPS, Java2D/AWT and bitmaps.

DynamicReports is an open source Java API reporting library based on JasperReports which lets you create sophisticated reports at the fastest way without need to use a visual designer. You can create sophisticated reports in very short time.

GenealogyJ is a viewer and editor for genealogic data, suitable for hobbyist, family historian and genealogy researcher. GenJ supports the Gedcom standard, is written in Java and offers many views like family tree, table, timeline, geography and more.

Barbecue is a Java library that enables the creation of barcodes in a variety of standard formats that can be displayed as Swing/AWT components, included in printed output, generated as EPS and SVG and displayed in a web application.

JMCAD is an program for the modeling and simulation of complex dynamic systems. This includes the ability to construct and simulate block diagrams. The visual block diagram interface offers a simple method for constructing, modifying and maintaining complex system models. The simulation engine provides fast and accurate solutions for linear, nonlinear, continuous time, discrete time, time varying and hybrid system designs. With JMCAD, users can quickly develop software or "virtual" prototypes of systems or processes to demonstrate their behavior prior to building physical prototypes.
The user builds his system model by selecting predefined blocks from a block library and simply wiring the blocks together. Each block of the diagram performs a function. Users can also create custom blocks in Java and add them to the JMCAD block library.
JMCAD is a block diagram language for creating complex nonlinear dynamic systems.

Java provides the concurrent library that simplifies concurrent programming, but this is hard to learn and visualize. This project is a series of animations each illustrating the coding and usage of a component in the java concurrent library.

Fedora Commons provides open-source software to ensure durability and integrity of digital content, use semantics to contextualize and inter-relate content from many sources, and to enable the creation of innovative, collaborative information spaces.

Biogenesis is an artificial life program that simulates the processes involved in the evolution of organisms. It shows colored segment based organisms that mutate and evolve in a 2D environment. Biogenesis is based on Primordial Life.